Each group needs:

• FlexiForce A201 sensor; for $14.63 at Tekscan
• battery (2-9 volts); such as a 9V Energizer® alkaline battery for $2.25
• mini multimeter; such as a 3½ digit mini digital multimeter for $9.95 at Jameco
• classic breadboard; such as a 400-point solderless breadboard (3.3 x 2.1 in) for $5.49 at Jameco
• 30k resistor; such as a resistor carbon film 30k ohm 1/3 watts 5% for 1¢ at Jameco
• LM741CN op amp; such as an op amp single general purpose +/-18V 8-pin MDIP rail for 29¢ at Jameco
• weight set, 100 g, 500 g, 1000 g, etc.
• Mechanix work gloves; for $15 at Lowes
• needle and thread, to sew glove fingers
• TI-84 or similar graphing calculator
• raw egg or empty eggshell
• Gentle Touch Background Handout, one per person
• Calibrating the Force Sensor Resistance/Conductance Instructions, one per group
• Calibrating the Force Sensor Data Collection Sheet, one per person
• Building an Electric Circuit Instructions, one per group
• Calibrating the Force Sensor Voltage Instructions, one per group
• Building an Electric Circuit Evaluation Sheet, one per person
• Designing and Building a Robotic Hand Guidance & Tips, one per group
• Check Your Understanding Summary, one per person

To share with the entire class:

• computer and projector to show the class A Robotic Hand with a Gentle Touch Presentation, a PowerPoint® file, and a few short online videos to introduce the topic
• (optional) pre-made example simple robotic hands made from cardboard, tape, drinking straws, rubber bands and cord; see the Procedure section for details
• black electrical wire, 22 gauge; such as 100 feet AWG black wire for $7.95 at Jameco
• red electrical wire, 22 gauge; such as 100 feet AWG red wire for $7.95 at Jameco
• wire strippers; such as 7-inch size for $5.95 at Jameco
• wooden dowel; such as round poplar dowel, .25-in x 48 in, for 78¢ at Lowes
• saw, to cut dowel into wood pucks
• seam ripper; for $2,45 at Walmart
• super glue; such as .28 oz of Duro super glue in four small tubes for $1.98 at Lowes
• scissors
• (optional) pin cushion